---
title: projectedPoints
framework: vision
role: symbol
role_heading: Instance Property
path: vision/trajectoryobservation/projectedpoints
---

# projectedPoints

The centroids of the calculated trajectory from the detected points.

## Declaration

```swift
let projectedPoints: [NormalizedPoint]
```

## Discussion

Discussion The projected points define the ideal trajectory described by the parabolic equation. The equation’s coefficients and the projected points of the detected trajectory get refined over time. The system limits the maximum number of cached points to the maximum points needed to describe the trajectory together with the parabolic equation.

## See Also

### Inspecting an observation

- [detectedPoints](vision/trajectoryobservation/detectedpoints.md)
- [equationCoefficients](vision/trajectoryobservation/equationcoefficients.md)
- [movingAverageRadius](vision/trajectoryobservation/movingaverageradius.md)